38 FLORA OF THE YELLOWSTONE NATIONAL PARK. 



Eibes lacustre, Poir, var. parvulum, Gray. 



Slough Cr|ek, 6900 ft. alt. ; Obsidian Canon, 7600 ft. alt. 



Eibes prostratum, L'ller. 



Tower Falls, 6200 ft. alt.; Yellowstone Lake (Adams). Rare. 



Bibes Hudsonianum, Eicliards. 



Along streams, Antelope Creek, 6400 ft. alt. ; Tower Falls, 6200 ft. 

 alt.; Yellowstone Falls (Adams). Not common. 



Ribes cereum, Dougl. 



Dry, open rocky places, Junction Butte, 6200 ft. alt.; Yellowstone 

 Lake (Adams). Rare. 



Ribes viscosissimum, Pursh. 



Rocky places and open-wooded slopes from 7000-9000 ft. alt.; Soda 

 Butte, 7500 ft. alt.; Elephant Back, 9000 ft. alt.; Yellowstone (Parry- 

 Forwood). 



Ribes floridum, L. 



Mammoth Hot Springs, 6200 ft. alt. Not common. 



CRASSULACEiE. 



Tillaea angustifolia, Nutt. 



]yiuddy shore of ponds, Yellowstone Lake with Elatine Americana. 



Sedum rhodanthum, Gray. 



Bogs, Cache Creek, 7000 ft. alt. ; Gibbon Lakes, 8000 ft. alt ; Tower 

 Falls (Coulter); Mud Springs, Yellowstone Lake and Upper Falls of the 

 Yellowstone (Adams). Rather local. 



Sedum stenopetalum, Pursh. 



Very common throughout, 6000-10,000 ft. alt. 



Sedum Douglasii, Hook. 



"Divide between Snake River and Yellowstone Lake, 8800 ft. alt." 

 (Adams). 



HALORAGE^. 



Hippuris vulgaris, L. 



In great quantities in sluggish streams and shallow ponds, 7500-8500 

 ft. alt.; Lewis Lake; Delusion Lake; Riddle Lake; head of Bioad 

 Crpek. 



Myriophyllum verticillatum, L. 



Lakes, head of Broad Creek, 8-400 ft. alt. 



